These sets come with what you see – two brackets and two d-rings in each set, and you can choose brass or nickel-plated steel. Dimensions are:
Hole spacing center to center is 15/16″. Mounting plate is 1-5/8″ long by 3/4″ wide. D-Rings have a 1″ inside width.
These are sturdy and rather large – attach them with screws or rivets (not included)
D-Ring Loop Set LOOP8
$8 per set, USA shipping included